Document Detail

Social integration, social contacts, and blood pressure dipping in African-Americans and whites.
MedLine Citation:
PMID:  20051909     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Both the size and diversity of an individual's social network are strongly and prospectively linked with cardiovascular morbidity and mortality. Social relationships may influence cardiovascular outcomes, at least in part, via their impact on physiologic pathways influenced by stress, such as daytime blood pressure (BP) levels. However, scant research has examined whether social relationships influence key nocturnal pathways, such as nocturnal BP dipping.
METHODS: The current study examined the degree to which social integration, as measured by participants' reported engagement in a range of different types of social relationships, and the frequency of daily social contacts influence the ratio of night/day mean arterial pressure (MAP) in a community sample of African-American and white men and women (N = 224). In addition, we examined the degree to which observed associations persisted after statistical adjustment for factors known to covary with nocturnal BP, including objective measures of sleep, catecholamines, health behaviors, and comorbidities.
RESULTS: In fully adjusted models, there was a significant association between both social integration and frequency of social contacts and the ratio of night/day MAP, indicating that socially isolated individuals were more likely to have blunted nocturnal BP-dipping profiles. There was also a significant interaction between social contact frequency and ethnicity, suggesting that the benefits of social relationships were particularly evident in African-Americans.
CONCLUSIONS: These findings contribute to our understanding of how social integration or conversely, social isolation, influences cardiovascular risk.
Wendy M Troxel; Daniel J Buysse; Martica Hall; Thomas W Kamarck; Patrick J Strollo; Jane F Owens; Steven E Reis; Karen A Matthews
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of hypertension     Volume:  28     ISSN:  1473-5598     ISO Abbreviation:  J. Hypertens.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-20     Completed Date:  2010-03-22     Revised Date:  2012-10-09    
Medline Journal Info:
Nlm Unique ID:  8306882     Medline TA:  J Hypertens     Country:  England    
Other Details:
Languages:  eng     Pagination:  265-71     Citation Subset:  IM    
University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
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MeSH Terms
African Americans
Blood Pressure / physiology*
Cardiovascular Diseases / etiology,  physiopathology,  psychology
Circadian Rhythm / physiology
European Continental Ancestry Group
Interpersonal Relations*
Linear Models
Middle Aged
Risk Factors
Social Environment
Social Isolation
Grant Support
HL076379/HL/NHLBI NIH HHS; HL076852/HL/NHLBI NIH HHS; HL076858/HL/NHLBI NIH HHS; K23 HL093220/HL/NHLBI NIH HHS; K23 HL093220-02/HL/NHLBI NIH HHS; K23 HL093220-04/HL/NHLBI NIH HHS; R01 HL076379-01/HL/NHLBI NIH HHS; R01 HL076379-04/HL/NHLBI NIH HHS; R24 HL076852-04/HL/NHLBI NIH HHS; R24 HL076852-05/HL/NHLBI NIH HHS; R24 HL076858-04/HL/NHLBI NIH HHS; R24 HL076858-05/HL/NHLBI NIH HHS; RR024153/RR/NCRR NIH HHS; UL1 RR024153/RR/NCRR NIH HHS; UL1 RR024153-02/RR/NCRR NIH HHS; UL1 RR024153-04/RR/NCRR NIH HHS

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